Julio Licinio: What amazing color

rain falling from a summer thunderstorm backlit by lightning, stars are visible in the night sky above the storm, and the canyon is lit by a nearly full moon, Grand Canyon National Park, summer photo copyright by Adam Schallau

Cloud spiral in the sky. An Iridescent (Rainbow) Cloud in Himalaya. The phenomenon was observed early am 18 Oct 2009 Cloud spiral in the sky. An Iridescent (Rainbow) Cloud in Himalaya. The phenomenon was observed early am 18 Oct 2009